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Contents
- Mystery Meteorite: The case for (and against) a rock from Mercury
- Hard Times for Theorists in a Post-Higgs World: The Large Hadron Collider’s big success leaves no clear avenue for new physics
- In the Eye of the Tiger: Global spread of Asian tiger mosquito could fuel outbreaks of tropical disease in temperate regions
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Contents
- Infection time: Disease is more severe when it hits in the morning, at least in mice
- Explainer: Our bodies’ internal clocks: Biological clocks determine hunger, sleepiness and other daily rhythms
- Flu in the air: Germs tiny enough to pass through surgical masks may cause half of all cases
Web edition: October 21, 2011
Print edition: November 5, 2011; Vol.180 #10 (p. 4)
ARTIFICIAL HEART VALVE — A previously hopeless condition of the heart — a defective heart valve — can now be corrected by successful surgery, it was reported at the American Heart Association meeting in Miami Beach, Fla. Many of the 500 gravely ill patients described by three teams of surgeons who did partial or total replacements of the aortic valve (located at the root of the aorta, the body’s main artery) are still living, 10 to 18 months following surgery.… Another key factor reported was the development of synthetic materials such as Teflon, which can safely be implanted within the body and which resists the formation of blood clots.
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